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Cooperative game theoretic load balancing scheme with admission control in IEEE 802.11 WlANs

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journal of Systems Engineering and Electronics 2009年第6期20卷 1361-1365页

作者： lü na Zhang Yuetong Zhang Guopeng The Telecommunication Engineering Inst. Air Force Engineering Univ. Xi'an 710077 P. R. China State Key lab. of Integrated Service Networks Xidian Univ. Xi'an 710071 P. R. China

A load-balancing scheme for IEEE 802.11 WlANs based on cooperative game theory is presented.A coalition among the access points（APs） with overlapping coverage is formed to share the network load through a ***, the candidate APs submit their load-competing strategies（i.e., the amount of user traffic they can admit in an AC/game period） to the control ***, the control AP solves the game by the method of shapley value, which is the maximum traffic allocated to each AP in an AC/game ***, the game is repeated periodically to distribute the traffic load among the *** results show that the proposed game can balance the network load effectively compared with the IEEE 802.11 standard balancing solution.

关键词： IEEE 802.11 DCF game theory load-balancing.

Nonaqueous potassium-ion full-cells:Mapping the progress and identifying missing puzzle pieces

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journal of Energy Chemistry 2024年第6期93卷 384-399,I0010页

作者： Badre larhrib louiza larbi lénaïc Madec Universite de Pau et des Pays de l’Adour E2S UPPACNRSIPREMPauFrance Universitéde Haute-Alsace Institut de Science des Matériaux de Mulhouse(IS2M)CNRS UMR 7361F-68100 MulhouseFrance Universitéde Strasbourg F-67081 StrasbourgFrance Réseau sur le Stockage Electrochimique de l’Energie CNRS FR3459AmiensFrance Institut des Matériaux jean Rouxel(IMN) CNRS UMR 6502Univ.Nantes44322 Cedex 3 NantesFrance

This review addresses the growing interest for potassium-ion full-cells(KIFCs)in view of the transition from potassium-ion half-cells(KIHCs)toward commercial K-ion batteries(KIBs).It focuses on the key parameters of KIFCs such as the electrode/electrolyte interfaces challenge,major barriers,and recent advancements in *** strategies for enhancing KIFC performance,including interfaces co ntrol,electrolyte optimization,electrodes capacity ratio,electrode material screening and electrode design,are *** review highlights the need to evaluate KIBs in full-cell configurations as half-cell results are strongly impacted by the K metal *** also emphasizes the importance of understanding solid electrolyte interphase(SEI)formation in KIFCs and explores promising nonaqueous as well as quasiand all-solid-state electrolytes *** review thus paves the way for practical,cost-effective,and scalable KIBs as energy storage systems by offering insights and guidance for future research.

关键词： K-ion full-cells Potassium-ion batteries Cross-talk Solid-state batteries Potassium reactivity Electrolyte design Electrode design

Decomposition of multi-particle azimuthal correlations in Q-cumulant analysis

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Chinese Physics C 2023年第10期47卷 178-196页

作者： l.nađđerđ j.Milošević D.Devetak 王福强 Department of physics "VINČA"Institute of Nuclear Science-National Institute of the Republic of SerbiaUniversity of BelgradeMike Petrovića Alasa 12-14Vinča 11351BelgradeSerbia Strong coupling Physics International Research laboratory Huzhou UniversityHuzhou 313000China College of Science Huzhou UniversityHuzhou 313000China Department of Physics and Astronomy Purdue UniversityIndiana 47907USA

The method of Q-cumulants is a powerful tool for studying the fine details of azimuthal anisotropies in high energy nuclear *** paper presents a new method,based on mathematical induction,to evaluate the analytical form of high-order *** capability of this method is demonstrated via a toy model that uses the elliptic power distribution to simulate the anisotropic emission of particles,quantified in terms of Fourier flow harmonics v_(n).The method can help in studying the large amount of event statistics that can be collected in the future and allow measurements of the very high central moments of the v_(2)*** can,in turn,facilitate progress in understanding the initial geometry,the input to the hydrodynamic calculations of medium expansion in high energy nuclear collisions,and the constraints on it.

关键词： quark gluon plasma azimuthal anisotropies Q-cumulants Pfaff transformation

Ammonium-dependent regulation of aerobic methane-consuming bacteria in landfill cover soil by leachate irrigation

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journal of Environmental Sciences 2012年第4期24卷 711-719页

作者： Fan lü Pinjing He Min Guo na Yang liming Shao State Key laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

The impacts of landfill leachate irrigation on methane oxidation activities and methane-consuming bacteria populations were studied by incubation of landfill cover soils with leachate and （NH4）2SO4 solutiort at different ammonium concentrations. The community structures and abundances of methane-oxidizing bacteria （MOB） and ammonia-oxidizing bacteria （AOB） were examined by PCR- DGGE and real-time PCR. Compared with the pure （NH4）2SO4 solution, leachate addition was found to have a positive effect on methane oxidation activity. In terms of the irrigation amount, ammonium in leachate was responsible for the actual inhibition of leachate. The extent of inhibitory effect mainly depended on its ammonium concentration. The suppression of the predominant methane- consuming bacteria, type I MOB, was responsible for the decreased methane oxidation activity by ammonium inhibition. Methane- consuming bacteria responded diversely in abundance to ammonium. The abundance of type I MOB decreased by fivefold; type II MOB showed stimulation response of fivefold magnification upon the first addition but lessened to be lower than the original level after the second addition; the amount of AOB was stimulated to increase for 20-30 times gradually. Accumulated nitrate from nitrification strengthened the ammonium inhibition on type I and type II MOB, as a result, repetitive irrigation was unfavorable for methane oxidation.

关键词： greenhouse gas emission landfill leachate methane oxidation methane-oxidizing bacteria (MOB) ammonia-oxidizing bacteria (AOB)

Template synthesis of silver indium sulfide based nanocrystals performed through cation exchange in organic and aqueous media

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nano Research 2021年第7期14卷 2321-2329页

作者： na Gao Rubo Zhang Bingkun Chen jinfeng Zhang Xiaoling Zhang Andrey l.Rogach School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China School of life Science Beijing Institute of TechnologyBeijing 100081China Department of Materials Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongHong Kong SARChina

Heavy-metal-free silver based I-III-VI semiconductor nanocrystals(NCs),including ternary silver indium sulfide(AgInS_(2))and derivative quaternary silver indium zinc sulfide(i.e.,AgInZn_(2)S_(4))NCs,possess advantages of low toxicity,and size-tunable band gaps approaching near-infrared spectral range,which make them candidates for use in optoelectronic and biological ***,we report syntheses of AgInS_(2) based NCs starting from In_(2)S_(3) template,which have been performed both in organic and aqueous phase through cation *** a result,ternary silver indium sulfide and quaternary silver indium zinc sulfide NCs are obtained in both organic and aqueous media,and confirmed to be orthorhombic AgInS_(2) NCs and hexagonal AgInZn_(2)S_(4) NCs,***,the aqueous AgInZn_(2)S_(4) NCs with red emission and low cytotoxicity are explored for the cancer cell imaging.

关键词： template synthesis silver indium sulfide based nanocrystals cation exchange organic and aqueous media

Some Properties of an Operator on l~∞(△)and Its Applications

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Acta Mathematica Sinica,English Series 2007年第10期23卷 1909-1914页

作者： na SUN lMAM and School of Mathematical Sciences Peking University Beijing 100871 P. R. China

In this paper, we introduce an operator Hμ（z） on l^∞（△） and obtain some of its properties. Some applications of this operator to the extremal problem of quasiconformal mappings are given. In particular, a suffi... 详细信息

关键词： norm Hamilton sequence extremal Beltrami coefficient Strebel point

From multicolor-photometric observations to a guaranteed mass of Al Cas

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Research in Astronomy and Astrophysics 2019年第8期19卷 19-30页

作者： Ya-Hui Wang jin-Zhong liu li-na lu Guo-liang lü School of Physical Science and Technology Xinjiang UniversityUrumqi830046China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi830011China University of Chinese Academy of Sciences Beijing100049China

We utilize the PAdova and TRieste Stellar Evolution Code(PARSEC) combined with photometric observations to determine a guaranteed mass of Al Cas and re-examine its related physical ***-photometric observations of Al Cas have been performed in 2016 and 2017. We use the WilsonDevinney(W-D) code to analyze the light curves and find that Al Cas is probably an A-subtype contact binary(f = 35.7±0.9%) with a mass ratio q = 0.6399±0.0230 and an effective temperature difference?T = 78 K. The mass-radius relation of a higher luminosity component for Al Cas is obtained by two methods: depending on calculation of the Roche lobe(DCRl method) and depending on calculation of the W-D code(DCWD method). Using this relationship with the PARSEC model, we investigate the component masses of Al Cas as M1 = 1.19±0.23 M⊙ with M2 = 0.76±0.18 M⊙ by the DCRl method and M1 = 1.22±0.26 M⊙ with M2 = 0.78±0.20 M ⊙ by the DCWD method. By means of the photometric studies, we examine the related physical properties of Al Cas with the latest findings. We update the orbital period(Porb = 0.50055593 d) of Al Cas according to six new times of light minimum together with those collected from the literature. Meanwhile, the(O-C)2 curve analysis suggests that the orbital period of Al Cas has a cyclic variation with a period of 81.25 yr and an amplitude of 0.01415 d. This cyclic change would be caused by the light-travel time effect from a third body. A similar mass of the third body(M3 sin i′= 0.279 M⊙) is derived from our two methods.

关键词： stars:binaries:close stars:binaries:eclipsing stars:individual:Al Cassiopeiae

Consistent Alterations of Human Fecal Microbes After Transplantation into Germ-free Mice

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Genomics, Proteomics & Bioinformatics 2022年第2期20卷 382-393页

作者： Yanze li Wenming Cao na l Gao Xing-Ming Zhao Wei-Hua Chen MOE Key laboratory of Molecular Biophysics Hubei Key Laboratory of Bioinformatics and Molecular-imagingDepartment of Bioinformatics and Systems BiologyCollege of Life Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Institute of Science and Technology for Brain-Inspired Intelligence(ISTBI) Fudan UniversityShanghai 200433China College of life Science Henan Normal UniversityXinxiang 453007China

Fecal microbiota transplantation(FMT)of human fecal samples into germ-free(GF)mice is useful for establishing causal relationships between the gut microbiota and human ***,due to the intrinsic differences between human and mouse intestines and the different diets of the two organisms,it may not be possible to replicate human phenotypes in mice through FMT;similarly,treatments that are effective in mouse models may not be effective in *** this study,we aimed to identify human gut microbes that undergo significant and consistent changes(i.e.,in relative abundances)after transplantation into GF mice in multiple experimental *** collected 16S rDna-seq data from four published studies and analyzed the gut microbiota profiles from 1713 human–mouse ***,on average,we found that only 47%of the human gut microbes could be re-established in mice at the species level,among which more than 1/3 underwent significant changes(referred to as“variable taxa”).Most of the human gut microbes that underwent significant changes were consistent across multiple human–mouse pairs and experimental ***,about 1/3 of human samples changed their enterotypes,i.e.,significant changes in their leading species after *** fed with a controlled diet showed a lower enterotype change rate(23.5%)than those fed with a noncontrolled diet(49.0%),suggesting a possible solution for *** of the variable taxa have been reported to be implicated in human diseases,with some recognized as the causative *** results highlight the challenges of using a mouse model to replicate human gut microbiota-associated phenotypes,provide useful information for researchers using mice in gut microbiota studies,and call for additional validations after *** online database named FMT-DB is publicly available at http://***/#/.

关键词： Germ-free mice Fecal microbiota transplantation Gut microbe Enterotype 16S rDna

Sn/n3O4-x heterostructure rich in oxygen vacancies with enhanced visible light photocatalytic oxidation performance

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International journal of Minerals,Metallurgy and Materials 2021年第1期28卷 150-159页

作者： Rui-qi Yang na liang Xuan-yu Chen long-wei Wang Guo-xin Song Yan-chen ji na Ren Ya-wei lü jian Zhang Xin Yu Institute for Advanced Interdisciplinary Research(IAIR) University of JinanJinan 250022China School of physics and electronics Hunan UniversityChangsha 410082China Institute Charles Gerhardt UMR 5253CNRS-UM-ENSCMUniversitéde MontpellierPlace Eugène BataillonF-34095 Montpellier cedex 5France

Sn3O4, a common two-dimensional semiconductor photocatalyst, can absorb visible ***, owing to its rapid recombination of photogenerated electron-hole pairs, its absorption is not sufficient for practical *** this work, a Sn nanoparticle/Sn3O4-x nanosheet heterostructure was prepared by in situ reduction of Sn3O4 under a H2 *** Schottky junctions formed between Sn and Sn3O4-x can enhance the photogenerated carrier separation *** the hydrogenation process, a portion of the oxygen in the semiconductor can be extracted by hydrogen to form water, resulting in an increase in oxygen vacancies in the *** heterostructure showed the ability to remove Rhodamine *** cytocompatibility experiments proved that Sn/Sn3O4-x can significantly enhance cell compatibility and reduce harm to *** work provides a new method for the fabrication of a Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.

关键词： photocatalysis tin oxide oxygen vacancy Schottky junction photodegradation